Algebra Refresher for Adults
Rebuild real confidence with variables, equations, formulas, lines, and quadratics in seven focused days.
This course is for members
$9 unlocks every course in the library, this one included, plus a credit to build a topic of your own and at least 10 new courses every month.
What you will learn about Algebra Refresher for Adults
The 7-day sprint
- Letters Are Just Numbers You Don't Know Yet. A variable is a placeholder for a number, and an expression is a recipe telling you what to do with it.
- The Balance Rule. An equation is a balanced scale, and you solve it by undoing operations equally on both sides.
- Distribute, Combine, Conquer. Messy equations become simple ones when you distribute across parentheses and combine like terms before you solve.
- Fractions, Percents, and Proportions. Fractions and percents are not a separate subject; clearing denominators or writing a proportion turns them into ordinary equations.
- Rearranging Formulas and Translating Words. Solving for a letter in a formula uses the same balance moves as solving for a number, and word problems become solvable the moment you name the unknown.
- Lines, Slope, and Two Equations at Once. A linear equation in two variables describes a constant rate of change, drawn as a straight line whose slope is the rate and whose intercept is the starting value.
- Exponents and Quadratics. Exponents are repeated multiplication with a few short rules, and quadratics are solved by factoring or by the quadratic formula.
The 80/20: the 6 concepts that matter most
- Do the Same Thing to Both Sides
- Like Terms and the Distributive Property
- Translating Words Into Equations
- Rearranging Formulas
- Linear Relationships and Slope
- Zero Product Property and Quadratics
The core idea, explained like you are 5
An equation is a statement that two things are equal, and you can find a hidden number by doing the same thing to both sides until the hidden number is alone.
Then the quiz and the ladder
10 questions that correct you when you are wrong, and beginner, intermediate, advanced levels, each with a practical exercise.